HotSwap Means that you have armors on your character.
The Archont set is in your bank.
You take Upper from your character and directly exchange it with Upper of arhont set in bank.

But the question to author is:
1) We do not get special effects? I think NO
2) Can you give us a gold hack for free servers? To take arhont set from banki we need (i do not remember) but arround 50kk or something like this(or 100kk)

haha you can wear anything you want and you don't need to edit the item.edf or level req of the armor. you'll need to search your armor and edit the armor ID. you can also do it on weapon and to all item.